Dentifrice



Patented Oct. 18, 1927.

UNITED STATES BOY H. mwum, OFPITTSBUBGB, PENNSYLVANIA.

mmrmrcn.

Io Drawing. Original application fled August 27, 1824, Serial Io.734,518. Divided and thin application fled October 18, 1828. Serialll'o. 141,835.

This invention relates to a dentifrice, and the present applicationconstitutes a division of application Serial No. 734,513, filed August17, 1924.

The object of the invention is to rovide a dentifrice which has noinjurious e ect upon the tissues or glands of the mouth, and whichpossesses certain particularly advantageous properties for cleansing theteeth and gums and for the general care of the oral cavity.

A problem encountered in compounding a satisfactory dentifrice is toprovide a substance which thoroughly cleanses the teeth;

but which contains no gritty substance capable of wearing away theenamel of the teeth, and no ingredient capable of exerting a solventaction thereon. v

A corollary function of a complete dentifrice is to dissolve andcompletely remove oils, fats, and mucin from the teeth; thus preventingthe formation of tartar and other deposits, and exposing the actualsurface of the teeth to direct contact of the" cleansing instrument tosecure a thorough cleansing thereof.

A still further desirable property of a dentifrice is to be capable ofexerting a mild antiseptic action, thus retarding the increase ofbacteria within the oral cavity without injuring any tissues of themouth or gums.

The dentifrice of the present invention meets these requirements by theincorporation therein of a substance which acts as a solvent of fats,oils, and mucin; and which has a mild antiseptic effect, withoutinjuring the teeth or tissues or impairing the flow or alkalinity of thesaliva.

A substance having these desirable properties for use in a dentifrice isthe halide of ethane, iodo-ethane, or ethyl iodide.

As used in a. dental cream, this active ingredientis combined withrelatively inert substances which provide filling material.

The following formula, involving ethyl iodide, is one which has beenfound to give satisfactory results:

Calcium carbonate (prepared chalk) Grams.

5e CaCO 100 Magnesium carbonate (MgCO,,) Ethyl iodide C H I 15-40 Whitemineral oil (hi hly refined pe- It should be understood that the formulagiven above is illustrative only, and that the ingredients other thanthe ethyl iodide may be varied in order to provide a dental cream of anydesired consistency and flavor. The amount of ethyl iodide may also bevaried, and, as this substance is harmless, it may be included in asgreat an amount as will remain in a uniform mechanical mixture with'theother ingredients of the composition. There is also no definite lowerlimit to the amount of this substance which may be used, as anyappreciable quantity will exert a beneficial effect. In order that themost advantageous results may be obtained, however, it is desirable thatthe amount of ethyl iodide in the composition should be fromone-twentieth of the total weight of the composition to an amount asgreat as may be retained in satisfactory condition therein.

It should be noted that ethyl iodide is a halogen substitution productof ethane, which is one of the paraflin series of hydrocarbons in thealiphatic division thereof. Other iodides of ethane itself may be usedinstead of the ethyl iodide, and iodides of the other members of theseries may also be substituted therefor.

Not only the monohalides of the paraffin series, but also the di-halidesand polyhalides of the series may be employed when their physicalproperties render them suitable for use in a dentifrice.

Propargyl iodide, an iodide in the acetylene series, has suitablechemical and physical properties, but its rarity renders its usegommercially impracticable.

In regard to any of these substances, it may be stated as a generalprinciple that the more desirable are those having a boilethyl iodide.

ing point between twenty-five degrees centigrade and one hundred andfifty degrees centigrade. To express the matter d1fierently, the moredesirable are those which are liquids at room temperature andatmospheric pressure. The compounds havlng a boiling point lower thantwenty-five degrees centigrade tend to evaporate from or separate in thecomposition, while those which are solid at room temperature and atmoheric pressure are too inactive impart t e desired qualities to the dentfrice.

While the specific gravities of the diflerent iodides vary considerably,it may be stated generally of all of them that the best results areobtained b using an amount in excess of one-twentieth :by weight of thetotal composition.

A satisfactory procedure 1n making the dental cream consists in mixingthe white mineral oil and the liquid iodide. They may then be added tothe solid constituents of the dentrifice, such as calcium carbonate andmagnesium carbonate, which absorbs them. The other constituents such asglycerme, soap solution, and water, to which t e flavoring matter. mayhave been previously added, are then added to the solid constituents,With the absorbed ingredients, to produce a dentifrice having a pastyconsistency.

In addition to the dental cream, one or more halogen substitutionproducts of hydrocarbons may be used in liquid form to secure anoccasional thorough cleansing of the teeth. One such liquid may consistmerely of a mixture of. tetrachlor methane and To such mixture, thewhite mineral oil may be added, if so desired, to retard evaporation ofthese volatile liquids. A satisfactory formula for such liquid may begiven as follows:

. Grams. Tetrachlor methane 3 Ethyl iOdide 1 White mineral oil 4 Whilewhite mineral oilis. highly desirable because of its lack of taste andodor,

various other mineral, animal, or vegetable oils may be substituted forit. For example highly refined olive oil or cottonseed oil may besatisfactorily used as a carrier for the organic halide,

What I claim is:

1. A dentifrice comprising ethyl iodide as its principal activeingredient.

2. A dental cream comprising ethyl iodide,

total composition.

a filling material, and a white mineral oil. 3. A dentifrice comprisingethyl iodide in an amount no less than one-twentieth by weight of thetotal composition.

.4. A dental cream comprising ethyl iodide, a filling material, and awhite mineral oil, the ethyl iodide being present in an amount no lessthan one-twentieth by weight of the total composition.

5. A dentifrice comprisin as its principal active ingredient an io ideof an aliphatic hydrocarbon.

6. A dental cream comprising as its principal active ingredient aniodide of an aliphatic hydrocarbon having its boilin poin" etween thelimits of twenty-five egree centigrade and one hundred fift degreescentigrade, a filling material, and a white mineral oil.

7. A dentifrice comprisin as its principal active ingredient an io ideof an aliphatic hydrocarbon in an amount no less than one-twentieth byweight of the total composition.

8. A dental cream comprising as its principal active ingredient aniodide of an aliphatic hydrocarbon having its boiling point between thelimits of twenty-five degrees centigrade, and one hundred fifty degreescentigrade filling material, and a white mineral oil, the iodide beingresent in an amount no less than one-twentleth by weight of the totalcomposition.

9. A dental'preparation comprising ethyl iodide as an active a ent, andan oleaginous carrier for the ethyl iodide.

10. A dental preparation comprising ethyl iodide as an active agent, anda white mineral oil as a carrier for the ethyl iodide.

11. A dental cream comprising as its principal active ingredientaniodide of an aliphatic hydrocarbon whichis liquid at ordinaryatmospheric temperatures and pressulre, a filling material, and a whitemineral oi 12. A dental cream comprising as its principal activeingredient an iodide of an aliphatic hydrocarbon which is liquid at ordinary atmospheric temperatures and pressures, a filling material, and awhite mineral oil, the iodide being present in an amount no less thanone-twentieth by weight of the In witness whereof, I hereunto set myhand.

RO H. BBOWNLEE.

